混凝土加固的目的是提高混凝土的强度，为此最常用的添加剂是金属钢筋。Because of concrete's massive weight and the amount of reinforcing material required to build solid concrete buildings of any significant height, most reinforced concrete is used for horizontal slabs. When buildings are constructed with concrete walls, the buildings are generally limited to a few stories. Reinforced concrete buildings and building components have distinct advantages over other construction methods, including durability, fire resistance, and wind resistance.